That lost something in translation. Your visa is a 10-year multi-entry type but is only good for six months?

What type of visa is it? "Type" in the formal sense, i.e. type B-2 ?

They can get quite complicated, depending on whether a visa is required, what the purpose of your visit is...and without referencing a specific visa type, there's a good chance someone won't know what applies to the one that's been issued to you.